基于TM影像的兰州市地表温度反演及城市热岛效应分析

Surface temperature inversion and the urban heat island effect of Lanzhou based on TM

为研究河谷型城市兰州的地表温度和热岛效应,采用单窗算法利用TM5影像对兰州的地表温度进行了反演,发现从遥感影像反映出城市温度明显高于以河流为代表的环境温度;同时当地实测温度也显示出同样的现象。然后对兰州市城区、河流及周边环境反演的温度进行差值分析得出结论,利用遥感影像反演地表温度具有一定可行性,该区域城市化过程中城市热岛效应正在一步步加剧。

To study the surface temperature of valley city of Lanzhou and the heat island effect,we used the TM5 to estimate Land Surface Temperature（LST） with mono-window algorithm.The results showed that surface temperature of city significantly higher than the environment temperature represented by the river and the local measured temperature also showed the same phenomenon.From the difference of the temperature of Lanzhou city、Yellow River and surrounding environment,we can get the conclusion that it is an effective method to inversion surface temperature using remote sensing images.Urban heat island effect was increasing step by step.